Opening of Bids - Sewer and Manhole Rehabilitation Project No 118-093 - Insituform Technologies USA LLC

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An Insiiu� form° cured-indaee pipe (C-WP) continues to exceed industry per ormance standards of ler 30 years in service. SUMMARY OF RESULTS After 30 years of service in a London sewer carrying both domestic and industrial effluent, an Insituform° CIPP was found to have a flexural modulus exceeding the nearest contemporary UK Water Industry Specification by 50%, and the current US standard by more than 90%. • The 30-year-old pipe's flexural modulus was an improvement over test data obtained after 20 years in service. There was no apparent deterioration in the overall performance of the Insituform° CIPP between its 20th and 30th year in service. INTRODUCTION In October 2001, tests were conducted by Bodycote Materials Testing Ltd. to determine the flexural properties of the samples taken from an Insituform° CIPP that had been in service for 30 years. The pipe samples were taken from a 1,170 mm X 600 mm (46 in. X 24 in.) egg -shaped sewer at Riverside Close in hackney, London. This is the same InsituformO CIPP that was sampled and tested in 1991, after 20 years in service, by Bodycote's predecessor MTS Pendar Ltd. I��i-. �.�... ........... ...,_�.._. Product tested: Insituform° Cured -In -Place Pipe (CIPP) Test: .Flexural Properties Conducted by: Bodycote Materials Testing Ltd. Report Date; November 2001 Supervising removal of the samples were representatives from both Bodycote and the sewer Owner, Thames Water Utilities Limited. PROCEDURE Two panels, approximately 300 mm (12 in.) square, were taken from a side wall of the sewer, approximately four meters downstream from a manhole. Three test pieces were cut from each panel as shown in the diagram below. The flexural properties of each test piece were determined by the method of BS EN ISO 178, in accordance with current UK Water Industry Specification (WIS) 4-34-04.